you are about to log in to the site error

Debian, isp3
I was looking in my AWstats and noticed several refernences to [email protected] in the external links section.
if I click on one of these links I get the follow message. you are about to log in to the site "mysite.com" with the username "webadmin", but the website does not require authentication. This may be an attempt to trick you. Is "mysite.com" the site you want to visit?
What does this mean?